package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 1.员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 对前端（用户）传来的明文密码进行md5加密，然后再和数据库中的进行比对（因为数据库的密码已经进行了加密）
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }


    /**
     * 3.新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        //一.将DTO数据转为Entity数据
            //1.创建Entity对象
            Employee employee = new Employee();
            //2.将DTO数据的属性复制到Entity数据中（用BeanUtils的copyProperties）
            BeanUtils.copyProperties(employeeDTO,employee);
            //3.添加隐藏数据
            employee.setStatus(StatusConstant.ENABLE);//状态
            employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));//密码
//            employee.setCreateTime(LocalDateTime.now());//创建时间
//            employee.setUpdateTime(LocalDateTime.now());//更新时间
//
//            //利用threadlocal动态获取当前登录用户的id
//            employee.setCreateUser(BaseContext.getCurrentId());//创建人
//            employee.setUpdateUser(BaseContext.getCurrentId());//更新人

        //二.调用mapper方法，将数据保存到数据库中
        employeeMapper.save(employee);
    }


    /**
     * 4.分页查询员工
     *
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //1.利用PageHelper插件，开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        //2.调用mapper方法查询数据，返回来得数据封装在page中
        Page<Employee> page =employeeMapper.pageQuery(employeePageQueryDTO);
        //获取总记录数
        long total = page.getTotal();
        //获取当前页数据
        List<Employee> records = page.getResult();


        return new PageResult(total,records);
    }

    /**
     * 5.启用或禁用员工
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //为了增强update的通用性，防止之后重复更新或者还需要更新其它参数所以
        //参数列表里传的是employee实体类

        //创建一个employee对象，将参数设置进去
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();
        employeeMapper.startOrStop(employee);
    }

    /**
     * 6.根据id查询员工
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee =employeeMapper.getById(id);
        //密码脱敏
        employee.setPassword("******");
        return employee;
    }

    /**
     * 7.编辑员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        //将DTO数据转为Entity数据
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.startOrStop(employee);
    }
}
